Maryland Courts and Judicial Proceedings Section 5-401

      A covenant, promise, agreement or understanding in, or in connection with or collateral to, a contract or agreement relating to the construction, alteration, repair, or maintenance of a building, structure, appurtenance or appliance, including moving, demolition and excavating connected with it, purporting to indemnify the promisee against liability for damages arising out of bodily injury to any person or damage to property caused by or resulting from the sole negligence of the promisee or indemnitee, his agents or employees, is against public policy and is void and unenforceable. This section does not affect the validity of any insurance contract, workers' compensation, or any other agreement issued by an insurer.